65
60 and 80 :D
63, 64
60, 72, 84, 90 and 96 each have twelve factors.
62 and 63 are two examples.
It is composite.
90 has factors other than 1 and itself, so it is not a prime number. For example, 90 is 9 x 10, so it is a composite number.
The halfway point between 60 and 90 can be found by calculating the average of the two numbers. To do this, add 60 and 90 together to get 150, then divide by 2 to get 75. Therefore, 75 is the number that is halfway between 60 and 90.
60, 72, 84, 90 and 96 each have twelve factors.
Assume you want to know if every number between 1 and 90 is a composite number. No, not every number between 1 and 90. Take 2 for instance. Then, 2 is prime since the factors of 2 are 1 and itself! * * * * * Assumed wrong! In the 90s refers to 90-99, but the answer is correct, because 97 is a prime.
75
90, 91, 92, 93, 94, 95, 96, 98, 99, 100 (including 90 and 100)
Composite numbers have factors other than 1 and itself. So, two good examples are: 62 and 84